So there we were in PHL about 3 days ago at spot 11 inbound, forced to come to a full stop shortly after shutting one down for a single engine taxi in. We stop because SWA is sitting right on top of spot 11 having a debate with the ramp controller. Aparrently, the issue boiled down to winglets. The captain took over from the F/O on the radio to enforce the point that she was not comfortable taxing into the congested area without a wing walker since they had a winglet airplane. I thought it looked like the winglets went pretty much straight up and down anyway, so I really didn't understand what the issue was. Did she mean that it was because it was a -700 series which I suppose has a slightly longer wingspan than a -300? We sat quietily burning our unhedged fuel while the ramp controller struggled to understand their point. I swear, we didn't say a word and quietly burned gas. Afterall, according to board member Miles O'Toole, SWA owns the place.